SWAP File error

I can't get started - I have downloaded GIMP 2.8 but can't get it running as I get this error message:

"USER Installation Failed
The GIMP user installation failed; see the log for details.
It appears that you are using GIMP for the first time. GIMP will now create a folder named '/Users/andrzejnowosielski/Library/Application Support/GIMP/2.8' and copy some files to it.